An automatic timed aerosol dispenser system. The dispenser operates quietly on 2 size-D batteries (not included). The batteries should last for about one year. The Country Vet dispenser operates around-the-clock and dispenses insecticide or fragrance every 15 minutes. The insecticide packaged with your dispenser will take care of 6,000 cubic, unobstructed feet, for one month. The insecticide is fully approved in food processing rooms, milk rooms, animal areas, stables, bathrooms, kitchens or any other enclosed area. Fly spray kills flies, mosquitos, gnats, and small flying moths. Dispenser includes one 30 day refills.